- A
Replace existing disks in each host with larger capacity disks and claim them to the same disk group
Why wrong: Replacing disks with larger ones is a valid method but is typically more disruptive as it may require data evacuation. It is not the recommended approach when disk slots are available.
- B
Combine disks from different hosts into a single disk group
Why wrong: Disk groups are per-host; combining disks from different hosts into a single disk group is not supported in vSAN.
- C
Add a new disk group on each host with additional capacity disks
Adding a new disk group on each host with additional capacity disks directly increases vSAN capacity without adding hosts, preserving existing storage configurations.
- D
Add a new VMFS datastore and use Storage vMotion to move VMs
Why wrong: Adding a VMFS datastore does not increase vSAN capacity; it creates a different storage type that does not integrate with vSAN policies.
VCP-DCV vSAN Disk Group Practice Question
This VCP-DCV practice question tests your understanding of vsphere architecture, products and solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: vSAN Disk Group. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator is planning a storage upgrade for a vSphere cluster. The cluster currently uses VMware vSAN as the primary datastore. The administrator wants to add capacity to the vSAN datastore without adding additional hosts. Which action should the administrator take?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Add a new disk group on each host with additional capacity disks
Option C is correct because adding a new disk group on each host with additional capacity disks directly increases vSAN datastore capacity without requiring host replacement. This method allows you to add new capacity disks while preserving existing disk groups and data placement policies. Option A is incorrect because replacing existing disks with larger ones, while possible, typically requires data evacuation or is more disruptive, and it is not the recommended approach when disk slots are available. Option B is invalid because disk groups are per-host; combining disks across hosts is not supported. Option D does not increase vSAN capacity and introduces a different datastore type.
Key principle: vSAN Disk Group
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Replace existing disks in each host with larger capacity disks and claim them to the same disk group
Why it's wrong here
Replacing disks with larger ones is a valid method but is typically more disruptive as it may require data evacuation. It is not the recommended approach when disk slots are available.
- ✗
Combine disks from different hosts into a single disk group
Why it's wrong here
Disk groups are per-host; combining disks from different hosts into a single disk group is not supported in vSAN.
- ✓
Add a new disk group on each host with additional capacity disks
Why this is correct
Adding a new disk group on each host with additional capacity disks directly increases vSAN capacity without adding hosts, preserving existing storage configurations.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
vSAN Disk Group
- ✗
Add a new VMFS datastore and use Storage vMotion to move VMs
Why it's wrong here
Adding a VMFS datastore does not increase vSAN capacity; it creates a different storage type that does not integrate with vSAN policies.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates might assume replacing disks (Option A) is the only method to increase capacity, overlooking that adding a new disk group (Option C) is a standard and often simpler approach that avoids data migration.
Detailed technical explanation
How to think about this question
vSAN uses disk groups as the fundamental unit of storage, each consisting of one or more cache devices (typically SSDs) and multiple capacity devices (HDDs or SSDs). When a capacity disk is replaced with a larger one, vSAN automatically resyncs the data and reclaims the additional space, provided the disk group remains intact. In real-world scenarios, this approach minimizes disruption because the disk group continues to serve I/O during the replacement process, and no VMs need to be migrated off the host.
KKey Concepts to Remember
- vSAN Disk Group
- Capacity Expansion
- Disk Claiming
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
vSAN Disk Group
Real-world example
How this comes up in practice
A practitioner preparing for the VCP-DCV exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. vSAN Disk Group Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Review vSAN Disk Group, then practise related VCP-DCV questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this VCP-DCV question test?
vSphere Architecture, Products and Solutions — This question tests vSphere Architecture, Products and Solutions — vSAN Disk Group.
What is the correct answer to this question?
The correct answer is: Add a new disk group on each host with additional capacity disks — Option C is correct because adding a new disk group on each host with additional capacity disks directly increases vSAN datastore capacity without requiring host replacement. This method allows you to add new capacity disks while preserving existing disk groups and data placement policies. Option A is incorrect because replacing existing disks with larger ones, while possible, typically requires data evacuation or is more disruptive, and it is not the recommended approach when disk slots are available. Option B is invalid because disk groups are per-host; combining disks across hosts is not supported. Option D does not increase vSAN capacity and introduces a different datastore type.
What should I do if I get this VCP-DCV question wrong?
Review vSAN Disk Group, then practise related VCP-DCV questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
vSAN Disk Group
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Last reviewed: Jul 4, 2026
This VCP-DCV practice question is part of Courseiva's free VMware certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the VCP-DCV exam.
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